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1. 发明授权

US4714992A Communication for version management in a distributed information service 失效
标题翻译：在分布式信息服务中进行版本管理的通信
公开(公告)号：US4714992A
公开(公告)日：1987-12-22
申请号：US801897
申请日：1985-11-26
申请人： Henry M. Gladney , Douglas J. Lorch , Richard L. Mattson
发明人： Henry M. Gladney , Douglas J. Lorch , Richard L. Mattson
IPC分类号： G06F12/00 , G06F17/30 , G06F1/00
CPC分类号： G06F17/30575 , G06F2216/09 , Y10S707/99953 , Y10S707/99957
摘要： In a distributed processing system network in which at least one node operates as a source location having access to data objects of a database, and at least one other node operates as a replica location storing replicas of data objects from the source location, managing obsolescence of the replicas is performed by having the replica locations submitting requests to the source location for ascertaining obsolescence of data objects. The source location, responsive to a request from a requesting replica location, extracts identifiers of a set of obsolete objects and communicates them to the requesting replica location. Upon receiving the identifiers, the requesting location renders inaccessible those data objects corresponding to the identifiers received. The source location then removes those identifiers that have been communicated to the requesting replica location.
摘要翻译：在其中至少一个节点作为具有对数据库的数据对象的访问的源位置的分布式处理系统网络中，并且至少一个其他节点作为存储来自源位置的数据对象的副本的复制位置操作，管理过时通过使副本位置向源位置提交请求以确定数据对象的过时来执行副本。源位置响应于来自请求的副本位置的请求，提取一组过时对象的标识符并将其传送到请求的副本位置。在接收到标识符之后，请求位置呈现与接收到的标识符相对应的那些数据对象不可访问。然后，源位置移除已传送到请求的副本位置的那些标识符。

2. 发明授权

US4714996A Impact calculation for version management in a distributed information service 失效
标题翻译：分布式信息服务版本管理的影响计算
公开(公告)号：US4714996A
公开(公告)日：1987-12-22
申请号：US801896
申请日：1985-11-26
申请人： Henry M. Gladney , Douglas J. Lorch , Richard L. Mattson
发明人： Henry M. Gladney , Douglas J. Lorch , Richard L. Mattson
IPC分类号： G06F12/00 , G06F15/16 , G06F15/177 , G06F17/30 , H04L29/00 , G06F9/00
CPC分类号： G06F17/30575 , H04L29/00 , G06F2216/09 , Y10S707/99954
摘要： In a distributed processing system having a source node accessing data objects from a database and a replica node storing replicas of requested source data objects received from the source location, the impact to replicas caused by a change in a source data object is calculated by assigning a version number to the change. An identifier of the portion of the source database affected by the change is generated, as well as a list of replicas containing objects from the affected portion of the database. For a replica location communicating with the source location, a table of the replicas from the list is then recorded along with the version number for communicating to the replica location.
摘要翻译：在具有从数据库访问数据对象的源节点和存储从源位置接收到的所请求的源数据对象的副本的副本节点的分布式处理系统中，通过分配源数据对象来对源复制数据对象的变化造成的影响进行计算版本号更改。生成受更改影响的源数据库部分的标识符，以及包含受影响部分数据库中的对象的副本列表。对于与源位置通信的副本位置，然后将来自列表的副本的表与用于与副本位置通信的版本号一起记录。

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